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Microfluid extraction method for extracting and separating In, Fe and Zn

A microfluidic and extraction technology, applied in the microfluidic field, can solve the problems of difficult separation of impurities, low extraction efficiency, easy emulsification of the solution, etc., and achieve the effect of strong controllability of conditions, high recovery efficiency, and efficient separation

Inactive Publication Date: 2013-04-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The technical problem to be solved by the present invention is to overcome the shortcomings of traditional solvent extraction of indium, such as low extraction efficiency, easy emulsification of the solution, difficulty in separating indium from impurities such as iron and zinc, serious environmental pollution, and high risk, and provides a method for extracting and separating In and Fe , Zn microfluidic extraction method is a new method with high efficiency, safety, pollution-free and high separation rate

Method used

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  • Microfluid extraction method for extracting and separating In, Fe and Zn
  • Microfluid extraction method for extracting and separating In, Fe and Zn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) The sulfuric acid system solution containing 4.52g / L indium, iron, and zinc (leaching solution in the process of hydrometallurgy of zinc) is used as the water phase, and the P204 extraction agent diluted with No. 260 solvent oil (30% volume fraction P204+70 %volume fraction solvent oil) as the organic phase respectively into the two flow pumps, the outlet end of the flow pump is connected to the inlet of the microreactor;

[0037] (2) Turn on the organic phase flow pump first, and after the organic phase enters the microchannel of the microreactor (with a characteristic size of 160 μm and a length of 380 mm), set and turn on the water phase flow pump at 0.65 times the flow rate of the organic phase, and at the same time The two-phase laminar flow interface formed in the microchannel is observed through an optical microscope (observation with a microscope can see that the water phase and the organic phase are moving in parallel from left to right in the microchannel, ...

Embodiment 2

[0040](1) The sulfuric acid system solution containing 3.17g / L of indium, 3.42g / L of iron, and 52.82g / L of zinc (leaching solution in the process of hydrometallurgy of zinc) is used as the water phase, P204 extractant diluted with conventional solvent oil ( 30% volume fraction P204+70% volume fraction solvent oil) as the organic phase respectively passed into two flow pumps, and the outlet end of the flow pump was connected to the inlet of the microreactor;

[0041] (2) Turn on the flow pump of the organic phase first, and after the organic phase enters the microchannel of the microreactor (with a characteristic size of 200 μm and a length of 80 mm), set the flow rate of the organic phase to 0.65 times and turn on the flow pump of the water phase, and at the same time The two-phase laminar flow interface formed in the microchannel is observed through an optical microscope (observation with a microscope can see that the water phase and the organic phase are moving in parallel fr...

Embodiment 3

[0044] (1) The sulfuric acid system solution containing 4.12g / L indium, iron and zinc (leaching solution in the process of hydrometallurgy of zinc) is used as the water phase, and the P204 extractant diluted with conventional solvent oil is used as the organic phase to pass into two flow In the pump, the outlet end of the flow pump is connected to the inlet of the microreactor;

[0045] (2) Turn on the flow pump of the organic phase first, and after the organic phase enters the microchannel of the microreactor (the characteristic size is 800 μm, the length is 90 mm), then set and turn on the flow pump of the water phase at 0.65 times the flow rate of the organic phase, and at the same time The two-phase laminar flow interface formed in the microchannel is observed through an optical microscope (observation with a microscope can see that the water phase and the organic phase are moving in parallel from left to right in the microchannel, and the two-phase laminar flow interface i...

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Abstract

The invention provides a microfluid extraction method for extracting and separating In, Fe and Zn. The microfluid extraction method comprises the steps of: using a sulfuric acid system solution containing indium, ferrum and zinc as a water phase and a P204 extracting agent diluted through solvent oil as an organic phase, which are respectively fed into two flow pumps, wherein the outlet end of the flow pump is connected with an inlet of a microreactor; simultaneously, observing a two-phase laminar flow phase interface formed inside a microchannel through an optical microscope, so that two phases flow in parallel and then begins to be separated when reaching a Y-type fork at the outlet of the microchannel, and the two phases flow out of the microreactor from outlets of the two phases; respectively collecting the two phases; and extracting indium to enter the organic phase and leaving ferrum and zinc in the water phase, so that the separation of indium, ferrum and zinc is realized. The extraction rate of In can be up to more than 90%, but ions of Fe and Zn are not extracted completely; moreover, no emulsion appears; and reaction time is greatly shortened, the using amount and consumption of the extracting agent can be reduced, the condition controllability is high, the safety is high, and extracted organic solvent is prevented from being exposed in the air.

Description

technical field [0001] The invention relates to a method for extracting valuable metals by using a microreactor system, which belongs to the field of microfluid technology. Background technique [0002] The extraction and separation process of hydrometallurgy can directly separate and purify a variety of metal ions from the solution, avoiding the waste residue generated during the separation process such as precipitation, crystallization or reduction, and the numerous processes from solution to slag and then to solution. key means of purification. However, there are still some key problems that need to be solved in the traditional extraction process: [0003] a. Large consumption of extractant [0004] Due to the relatively long extraction and stripping time, multi-stage or even more than ten stages of extraction are often required. In order to meet the requirements of extraction and mass transfer, a large amount of extractant is used. In addition, the extractant has a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B3/02C22B58/00
CPCY02P10/20
Inventor 巨少华魏亚乾彭金辉张利波代林琴张利华郭战永
Owner KUNMING UNIV OF SCI & TECH
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